Make sure you download the 1.6.1 version as that is really the latest:

SourceTree 1.6

Enhancements

All new file status view

Improved diff view

New view configurations

Cleaner user interface

All new welcome wizard

SourceTree 1.6.1

Bugfixes

SRCTREEWIN-1902: Fix crash bug when trying to create a new repo from hosted repos screen

SRCTREEWIN-1915: Fix a rare crash bug which could happen when closing/re-opening a repository

SRCTREEWIN-1894: Staging/unstaging will get ‘stuck’ and not refresh the file list if you turn on ‘always display full console output’ when performing these operations. The refreshing now happens regardless of whether that option is turned on or not.

Line 1 gets the CFE bootloader version
(1.0.2 and lower boot with 32K of NVRAM, 1.0.3 and up with 64K of RAM; some Firmwares work around the 32k limitation)

Line 2 gets the Firmware model and version

Line 3 gets the CPU speed

Line 4 and 5 get the temperature for eth1 (2.4 Ghz) and eth2 (5 Ghz) in Celsius
It is based on the RMerlinDev (firmware developer) information on temperatures: These are for each radio. Take the returned value, divide by 2, then add 20. Results are in Celcius.
Next to that knowledge, it uses a few tricks on awk calculation, and first parameter in awk (the second parameter would be the hex value of the temperature code in parenthesis) which is easier than shell calculations.